<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    /* div p {
      color: red;
      font-size: 40px;
    } */

    div p b {
      color: red;
      font-size: 40px;
    }
  </style>
</head>

<body>

  <div>
    <p>this is tag p1 <b>!</b> </p>
  </div>

  <p>
    this is tag p2 <b>!</b>
  </p>

  <div>
    <b>hello tag b</b>
  </div>

</body>

</html>